July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!
Knock Sensor (3MZ-FE): Components
WARNING: This page is about a different car, the 2005 Lexus RX 330. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Knock Sensor Components And Replacements (1 Of 4)